Flight OddsUA4397 GRB → ORD
United Airlines · Green Bay, WI to Chicago, IL · 34 flights observed, 2025-10-26 to 2026-06-30 · 173 mi
UA4397 covers more than one route in the data window — the stats below are for GRB → ORD, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
88%
Median delay
-5 min
90th percentile
+17 min
Cancellation rate
0%
How often is UA4397 on time?
Across 34 flights on GRB → ORD from 2025-10-26 to 2026-06-30, UA4397 arrived within 15 minutes of schedule 88% of the time. The median arrival delay was -5 min, and the worst 10% of flights arrived +17 min or later. 0% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 29 | 88% |
| 16-30 min | 2 | 6% |
| 31-60 min | 1 | 3% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 1 | 3% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-10 | 6 | 83% | -13 min |
| 2026-02 | 16 | 81% | +29 min |
| 2026-03 | 4 | 100% | -10 min |
| 2026-05 | 1 | 100% | +2 min |
| 2026-06 | 6 | 100% | -3 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 5 | 100% |
| Tue | 5 | 80% |
| Wed | 4 | 100% |
| Thu | 6 | 100% |
| Fri | 4 | 50% |
| Sat | 4 | 100% |
| Sun | 5 | 80% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…